El Paso is the county seat of El Paso County, Texas, United States. The city is situated in the far western corner of the state of Texas. El Paso stands on the Rio Grande (Río Bravo del Norte) across the border from Ciudad Juárez, Chihuahua, Mexico. The city is also the headquarters of one Fortune 500 and three publicly traded companies, as well as home to the Medical Center of the Americas, the only medical research and care provider complex in West Texas and southern New Mexico, and the University of Texas at El Paso, the city's primary university. The city hosts the annual Sun Bowl college football post-season game, the second oldest bowl game in the country.